summaryrefslogtreecommitdiff
path: root/arch/x86/kernel/cpu/common.c
diff options
context:
space:
mode:
authorVegard Nossum <vegard.nossum@oracle.com>2017-02-08 10:44:11 +1100
committerStephen Rothwell <sfr@canb.auug.org.au>2017-02-17 16:03:17 +1100
commit5ba8974f69c28a4cd3586d66e5c376760da0f94b (patch)
tree5283f96299856f232e2e9f45b100f289742b93ba /arch/x86/kernel/cpu/common.c
parent803d7fc24ac8eb2bd495eb271e0989b4c1803d3d (diff)
mm: add new mmgrab() helper
Apart from adding the helper function itself, the rest of the kernel is converted mechanically using: git grep -l 'atomic_inc.*mm_count' | xargs sed -i 's/atomic_inc(&\(.*\)->mm_count);/mmgrab\(\1\);/' git grep -l 'atomic_inc.*mm_count' | xargs sed -i 's/atomic_inc(&\(.*\)\.mm_count);/mmgrab\(\&\1\);/' This is needed for a later patch that hooks into the helper, but might be a worthwhile cleanup on its own. (Michal Hocko provided most of the kerneldoc comment.) Link: http://lkml.kernel.org/r/20161218123229.22952-1-vegard.nossum@oracle.com Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/x86/kernel/cpu/common.c')
-rw-r--r--arch/x86/kernel/cpu/common.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index f07005e6f461..c64ca5929cb5 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1510,7 +1510,7 @@ void cpu_init(void)
for (i = 0; i <= IO_BITMAP_LONGS; i++)
t->io_bitmap[i] = ~0UL;
- atomic_inc(&init_mm.mm_count);
+ mmgrab(&init_mm);
me->active_mm = &init_mm;
BUG_ON(me->mm);
enter_lazy_tlb(&init_mm, me);
@@ -1561,7 +1561,7 @@ void cpu_init(void)
/*
* Set up and load the per-CPU TSS and LDT
*/
- atomic_inc(&init_mm.mm_count);
+ mmgrab(&init_mm);
curr->active_mm = &init_mm;
BUG_ON(curr->mm);
enter_lazy_tlb(&init_mm, curr);